code: def generate_inputs(self):
      return tuple(
          [
              numpy.random.uniform(-1, 1, self.shape).astype(self.dtype)
              for i in six.moves.range(self.xs_length)
          ]
      )
  
file_path: chainer/tests/chainer_tests/functions_tests/array_tests/test_hstack.py
imports: import unittest
  import numpy
  import six
  from chainer import functions
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the TestHstack obj's underlying member method code with example usage: obj.generate_inputs() and returns: tuple